/* 缓冲区 */

.z-banner{
    width: 100%;
    height: 300px;
 
    position: relative;
}
.h{
    margin-top:1px;
    background: url(https://dycom.oss-cn-hangzhou.aliyuncs.com/userfiles/ScenicCityPhoto/20180901/20180901111738_4644.jpg) no-repeat center center;
}

.z-ban-bg {
    width: 100%;
    height: 300px;
    position: absolute;
    left: 0;
    top: 0;
    background: rgba(0,0,0,.3);
}
.container {
    width: 1200px;
    margin: 0 auto;
    position: relative;
}
.z-banner .d-ta {
    width: 100%;
    text-align: center;
    color: #fff;
    height: 166px;
    margin-top: 100px;
}
.z-banner .d-ta .b {
    font-size: 20px;
    text-shadow: 0px 1px 3px #b3b3b3;
}